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| n | a(n) |
|---|---|
| 7 | 1 |
| 8 | 29 |
| 9 | 492 |
| 10 | 6401 |
| 11 | 70880 |
| 12 | 704676 |
| 13 | 6490951 |
| 14 | 56524414 |
| 15 | 471750267 |
| 16 | 3810085912 |
| 17 | 29989229859 |
| 18 | 231255237311 |
| 19 | 1754111872429 |
| 20 | 13128442913712 |
| 21 | 97189645384884 |
| 22 | 713050007285941 |
| 23 | 5192646586465458 |
| 24 | 37581376345088462 |
| 25 | 270593146237918806 |
| 26 | 1939929376872664097 |
[1,29,492,6401,70880,704676,6490951,56524414, 471750267,3810085912,29989229859,231255237311, 1754111872429,13128442913712,97189645384884, 713050007285941,5192646586465458, 37581376345088462,270593146237918806, 1939929376872664097] |